how to place C# code/syntax within concatenated string
Question
I have a string that I am concatenating so as to then generate a pdf using C# and ITextSharp. I have some values such as paymentId from my model that I would like to also display on the pdf.
The pdf is generated successfully until I try to add the values from my model eg "onlineTransactionViewModel.OnlineTransaction.PaymentId"
var example_html = @"<html>
<body style = 'font-family: Helvetica Neue, Helvetica, Helvetica, Arial, sans-serif; text-align: center; color: #777'>;
<div class='invoice- box'>
<table>
<tr class='top'>
<td colspan=""5"">
<table>
<tr>
<td colspan= ""3"">'onlineTransactionViewModel.OnlineTransaction.PaymentId' ""</br>"" ""onlineTransactionViewModel.OnlineTransaction.PayFastReference"" ""</br>"" ""onlineTransactionViewModel.OnlineTransaction.PayFastReference""
<td class= ""title"" style = 'text - align:right'></ td >
</ tr >
</ table >
</ table >
</ div >
</ body >
</ html>";
using (var htmlWorker = new iTextSharp.text.html.simpleparser.HTMLWorker(doc))
{
//HTMLWorker doesn't read a string directly but instead needs a TextReader (which StringReader subclasses)
using (var sr = new StringReader(example_html))
{
//Parse the HTML
htmlWorker.Parse(sr);
}
}
doc.Close();
1 answers
solution1
1 2023-01-16 12:17:57
You need to use string interpolation.
From C# 6, string interpolation could be combined with string literals by appending "$@" to a string.
When using string interpolation, you need to contain the content that you want to reference code with "{" and "}".
If you update your string to the following, you should get the intended result:
var example_html = $@"<html>
<body style = 'font-family: Helvetica Neue, Helvetica, Helvetica, Arial, sans-serif; text-align: center; color: #777'>;
<div class='invoice- box'>
<table>
<tr class='top'>
<td colspan=""5"">
<table>
<tr>
<td colspan= ""3"">'{onlineTransactionViewModel.OnlineTransaction.PaymentId}' ""</br>"" ""{onlineTransactionViewModel.OnlineTransaction.PayFastReference}"" ""</br>"" ""{onlineTransactionViewModel.OnlineTransaction.PayFastReference}""
<td class= ""title"" style = 'text - align:right'></ td >
</ tr >
</ table >
</ table >
</ div >
</ body >
</ html>";
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